Most travel businesses don’t request a TOMS VAT review. They end up with one.
A TOMS errors historic review almost always begins the same way — not with a planned audit, but with a question that didn’t have a clean answer.
Either HMRC asks questions, or a new accountant looks at the historic records and goes quiet for a moment before saying something careful. Or the business owner starts doing their own research — reading about TOMS for the first time, properly — and realises that what their previous accountant was doing doesn’t match what they’re reading.
A TOMS VAT assessment for a travel agent almost never starts as a planned exercise. That moment of realisation is where most TOMS reviews begin. Not from a proactive decision to check. From the uncomfortable suspicion that something isn’t right.
What a TOMS review actually involves
A TOMS VAT review for a travel business is a structured examination of historic VAT treatment — going back through previous periods to establish whether TOMS was applied correctly, whether principal and agent income was correctly classified, and whether the margin calculations reflect the actual transaction structure.
It is not a simple exercise. It requires access to the original bookings, the supplier invoices, the cost allocations, and the VAT returns for each affected period. In a business that has been operating for several years with incorrect treatment, that can mean reconstructing data across multiple VAT quarters.
What the review establishes is not just whether errors exist. It establishes the nature of the errors, the direction they run — overpayment or underpayment — and the quantum. That last figure is the one that determines what happens next.
What a TOMS review typically finds
In my experience, a TOMS errors historic review of travel businesses that have been with generalist accountants fall into three categories.
The first is standard VAT applied where TOMS should apply. The business has been acting as principal — buying in travel services and reselling them in its own name — but VAT has been calculated on the full selling price rather than on the margin. Output VAT has been overstated in some periods and understated in others, depending on margin levels. The net position depends on how the business has been pricing its services.
The second is commission misclassification. The business has been treating principal income as agent commission — reporting VAT only on a fee rather than accounting for VAT under TOMS on the full margin. This is typically an underpayment situation and is the more serious of the two from an HMRC perspective.
The third is margin calculation errors. TOMS has been applied but the margin itself has been calculated incorrectly — costs allocated to the wrong bookings, timing mismatches between income and cost recognition, or mixed supplies not properly separated. The returns look right. The numbers are wrong.
In practice, many reviews find a combination of all three.
The direction of the error matters
This is something that surprises most travel business owners when they first hear it.
TOMS errors do not always mean you owe money to HMRC. In a significant number of cases, the error runs the other way — the business has been overpaying VAT because standard VAT was applied to income where TOMS would have produced a lower liability. In those cases, a TOMS review can result in a repayment claim.
That does not make the situation straightforward. Repayment claims for historic periods require properly reconstructed calculations, correct documentation, and an understanding of how HMRC approaches amendments for earlier years. But it does mean that a TOMS review is not always a cost — sometimes it recovers money that has been quietly overpaid for years.
The direction of the error depends on margin levels, pricing structure and how the misclassification ran. This is why the review has to be done properly before any conclusions are drawn about the financial position.
The voluntary disclosure question
If a TOMS review identifies underpaid VAT — errors that have resulted in less VAT being paid than should have been — the business faces a decision about how to proceed.
Voluntary disclosure to HMRC attracts significantly lower penalties than errors identified under investigation. A business that identifies its own errors, quantifies them correctly and approaches HMRC proactively is treated differently from one that receives an enquiry letter first.
This is not a comfortable decision to make. It requires accepting that previous returns were incorrect, funding the correction, and having a conversation with HMRC that most business owners would rather avoid. But the alternative — waiting to see if HMRC notices — carries a higher cost if they do.
The timing of voluntary disclosure matters too. The sooner errors are identified and disclosed, the lower the accumulated interest liability on any underpaid VAT.
What happens after a TOMS review
Once the review is complete and the errors are quantified, there are three possible outcomes.
The first is that no material errors are found. The historic treatment was broadly correct, any minor discrepancies are within normal tolerance, and the business can proceed with confidence that its VAT position is sound. This is rarer than most people expect — but it does happen.
The second is that errors are found but they run in the business’s favour. A repayment claim is prepared, submitted to HMRC, and the business recovers VAT it has been overpaying. The historic records are corrected, the bookkeeping structure is adjusted going forward, and the business continues with correct treatment in place.
The third is that errors are found that represent an underpayment. Voluntary disclosure is prepared, HMRC is approached, and the liability — including interest — is settled. Penalties are mitigated by the voluntary nature of the disclosure. The bookkeeping structure is corrected going forward.
In all three cases, the outcome of the review is the same: clarity. The business knows where it stands. That clarity has a value regardless of which direction the numbers run.
When to request a TOMS review
The most common trigger is switching accountants — a new specialist looking at historic records for the first time. The second is an HMRC enquiry, which forces the review rather than allowing it to happen proactively.
The best time is before either of those triggers arrives.
If your travel business has been with a generalist accountant, if TOMS has never been formally reviewed, or if you have any uncertainty about whether your VAT treatment has been correctly applied — the right time to look at this is now. Not because something has gone wrong. Because finding out whether something has gone wrong, on your own terms, is significantly better than finding out on HMRC’s.
If you are a UK travel agent or tour operator and you want to understand whether your TOMS VAT treatment is correct, that review is where we start with every new client.
You can also read about the most common TOMS VAT mistakes that a review typically uncovers, and about what switching accountants as a travel business involves when historic TOMS errors are part of the picture.
